174 Mr. C. H. T. Townsend on Two new 



except GUricola and possibly Triinenopon there are six pairs 

 of abdominal spiracles, and they ojieii upon either the third 

 to the eighth or upon the second to the seventh segments — 

 never upon the first seoment *. 



Finally, neitiier the chretotaxy nor the coloration lend any 

 supi ort to Kellogg's interpretation. 



XIII. — Two neio Genera of African Muscoidea. By CilAULi'.S 

 i\. T. Townsend, Bureau of Entomoiogv^ VVashingiop, 

 D.G. 



CONGOCHRYSOSOMA, gen. nov. 



Genotype, ConcjocTirysosoma snyderi, sp. n. 



Differs from Chrysomasicera as follows : — Female only : 

 Eyes bare. Vertex about three-fourths width of one eye. 

 Ocellar bristles very small, but distinct, short. Outer verticals 

 scarcely developed. Second antennal joint elongate, the 

 third only one and one-half times second. Arista shorter. 

 Face rather flattened, epistoma quite prominent, vibrissse well 

 above oral margin. Tarafaciais bristly in middle. Four 

 lateral pairs of scutellar macrocha3tse ; a short median pair 

 on first abdominal segment, no discals on intermediate 

 segments. Hind tibise short-ciliute, with a longer bristle 

 below middle. 



Congochrysosoma snyderi, sp. n. 



Length of body 11"5 mm., of wing 9"5 mm. 



One female, Luebo, Congo (/>. W. Snyder). 



Face dull silvery, the parafacials with a faint greenish 

 lustre. Ciieeks silvery, with a bronze lustre. Parafrontals 

 greenish bronze. Frontalia and aiiteni se blackish, the 

 second antennal joint brown. Palpi fulvous, infuscate at 

 base. Mesoscutum and arcuate area on base of scutellum 

 greenish bronze ; five vittae showing, widening and narrowing 

 with the incidence of light, the middle one disappearing in 

 front of suture in some lights. Pleurae, humeri, and outer 

 aspect of front femora ratlier silvery. Abdomen and very 

 broad margin of scutellum bright frosted green, the first 

 segment and ratlier irregular hind borders of others black. 



* See Launcelot Harrison, ' Parasitologv,' vol. viii. no. 1, June 2otli, 

 1915, p. 101. 



